Double Cross Square: Faceting Design Diagram

Zircon (Hyacinth, Starlite)

Double Cross Square (ZIRCON6.JRG)
By Jeff R. Graham
Copyright 1993
88.8% Light Return
Angles for R.I. = 1.93
101 facets + 8 facets on girdle = 109
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.505 T/L = 0.505
P/W = 0.448 C/W = 0.201
H/W = (P+C)/W+0.02 = 0.669
P/H = 0.670 C/H = 0.300
Vol./W^3 = 0.286

Addition # 2 - This design is not as hard to cut as it might look, it is all cut to center point except for the 2 step cuts. However, this design is not for a new cutter, unless you just want to try it, 1-18cts. Cut in refractive indexes 1.76 to 2.14 with no changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler